1H-Indole-3-methanaminium, 5,5'-oxybis(2-(ethoxycarbonyl)-N,N,N-trimethyl-, bis(methylsulfate) 2,2'-Diethoxycarbonyl-3,3'-bis(dimethylaminomethyl)bis-(5-indolyl) oxide dimethosulfate 84905-59-9 Ammonium, oxybis((2-carboxy-5,3-indolylene)methylene)bis(trimethyl-, bis(methyl sulfate), diethyl ester